Charles



C. S. HAMLIN.

PIPE.

APPLICATION FILED AUG.22, 190B. REHEWIID IAB. 9, 1908.

Patented Oct. 20, 1908.

IzUe/zzar /af'ed JX fzvrzlz UNITED STATES PATENT OFF-ICEv y CHARLES HAMLIN, OF LOS ANGELES, CALIFORNIA, ASSIGNOB. TO W. WILSON, LOS

HQGllELES, CALIFORNIA. o

PIPE

Specicaton o! Letters Patent.

Patented ot'..2o, isos.

Application med August 22, 1966, Serial No. 331,673. Renewed Iareh 9, 1300. Serial No. 420,107.

To all 'whom 'it 'may concerm.

Beit known that I, CHARLES I-IAMLIN, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of Ca1iforniahave invented a new and useful Pipe, of which the following 1s a spec1- ication.' i

This invention has relation to pipes and articular-ly to sheet metal pipes designed ihr use in conveying hydrocarbons, over extended distances.

.One of the objects of this invention is to produce a pipe which by reason of its peculiar manufacture is adapted to withstand the heavy strains of liquids carried therem and furthermore to avoidv all leakage by a fault in the seam of the pipe. Y

A further object of this invention is to render the seam formed on the pipe proof against rust as well as against consequent leakage.

The accompanying drawings illustrate the invention Figure 1 is a perspective of the invention, representing the first step of the manufacture of the pipe with a layer of fire proof materlal inter osed between the` upwardly and outward y extending flanges. Fig. 2 represents a similar view showing the second step in the manufacture of this pipe. Fig. 3 shows the final step. Fig. 4 is an enlarged fragmentary vertical section of the seam. Fig. 5 isa similar view enlarged.

l Specific reference being had to the drawings, 1 represents a (pipe having formed thereon a flange 2 exten mg substantially at right angles to the perimeter of the pipe.

3. represents a similar flange considerably larger than the said flange 2, the two being brought into alinement with each other in the course of manufacturing the pipe, the layer being then adapted to overlap the smaller of the flanges 2. Between the two flanges is interposed a fire roof layer 4 of any suitable material pre erably asbestos cloth. This layer of asbestos cloth forming a gasket is of approximately the size and dimensions of the larger iiange 3, and follows the bend of said flange in the course of overlapping the lower or smaller flan e 2.

AThe process of manufacturing t e pipe disclosed 1n this application consists in bending the respective edges of a strip of metal upon itself to form folds of unequal width, bending said strip helically upon itself whereby the respective folds are brought into alinement; spreadin the folds at right angles to the surface of t e pi e, causing the engagement of the folds in t e presence of heat, riveting said folds, bending the folds upon the exterior surface of thepipe in the presence of. heat so that the rivet pins lie wholly exteristep of the process, namel that which is indicated in Fig. 2, it will e seen that when the larger of the two flanges is caused to overla the smaller, the mass of asbestos lying etween the two is compressed and made to follow the course of the larger liange, which envelops the smaller and onto which it is riveted, as shown by the rivet-pins '6, which pins also serve to hold in place the asbestos layer.

In carrying out the various ste s of the process, the direct application of). heat is necessary. This necessitates the employment of heat resisting agencies in the seam to forestall any possibility of leakage in the completed pipe, and of course to prevent the diffusion o the interposed layer by reason of the excessive heat upon the flanges in connection with 'the formation of this seam. For that reason no other than a fire resisting material can be used as a layer between the upturned flanges of the `pipe previous to the formationvof the completed seam. -Furthermore, such material must not comprise?,

material as will be dissolved by the oil traveling through the pipe, but the la er must consist of a medium not only hig y resistant to the action of excessive heat and dissolvents, but absolutely immune to them.

The representation in Fi 3 is of the entire pipe, that is of the fina step in the formation of the pipe showing the completed seam with the interposed layer. In this form the layer of heat resisting material completely envelops the flange 2' and is intimately held in contact with the opposing flanges by rivet pins extending through and binding the two together, in other words the two under surfaces, namely, the flange and the asbestos vstrip encircle the flan e 2, the last step of the process where it ies flush with each other, as seen in Fiv. l.

4bring the asbestos strip in t c same plane interlock, said curve upon the periphery of the plate.: It is of course obvious that this strip of fire resisting material must be inserted in the second ste of the process when the flanges lie arall'l1 with respect to the lower flange 2 as the larger flange 3, whereby in the course of completing the seam the laver, being of the same length as the larger ange, retains its length and consequently forms arperfectly` tight and seamless joint. The ipe in its completed form is therefore provlded with a seam which lies wholly exteriorly of the pipe, which seam is likewise riveted, the rivet pins also being on the outside of the pipe and not Vpiercing the walls of the same.

What I claim is 1. As a new article of manufacture, a pipe composed of a strip of wound metal provided with curved ed es which respectively edges having interposed an asbestos linin the interlockin edges with the interposed ining being rivete together, the rivets lying wholly exteriorly of the pipe.

2. As a new article of manufacture, a pipe composed of a convoluted strip of sheet metal provided with curved edges which respectively interlock and lie u on the surface of t e pose a li uid-proof packing, the interlocking edges eing riveted, the rivets lying exteriorly of the pipe and upon the outer periphery of the same.

3. As a new article of manufacture, a pipe composed of a strip of metal provided with curved edges which respectively interlock and lie u on the surface of the pipe," the curved e ges having interposed an asbestos strip, and the curved edges being riveted,

the rivet extending solely through the interlocke edges without piercing the pipe.

4. As a new article of manufacture, a plpe composed of a strip of metal coiled upon and away from itself and having its edges curved, which edges lie in proximate relative alinement and are of unequal sizes, the greater of which is arranged to overlap and interlock with the smaller, an asbestos lining interposed between said interlocked edges, and 4 pipe, the curved e ges having interrivet pins extending through the interlocked edges and the lin1ng the rivet pins lying wholly exteriorly of the pipe. y

5. As a new article of manufacture, a pipe composed of a convoluted strip of sheetmetal provided with reversely-eurved edges which 1nterlock and lie in proximity to the surface of the pipe, the interlocking ed es alone being riveted and extending who exteriorly of the p'pe whereby the bore of the same is always free. f

6. As a new article of manufacture, a ipe com osed of a strip of metal wound to orm a he ix and provided on one side with an edge which is curved awa from the c lindrical surface of the body, t e terminus of7 the edge being curved upon itself, and on the other side with an edge curved upwardly and u on itself, said edge being arranged to inter ook with the 'first-named edge and lie u on the surface of the pipe, the interlocke edges having rivets passing through the same, which do not pierce the wall of the lpipe but lie wholly exterior thereto.

7. As a new article of manufacture, a ipe com osed of a strip of metal wound to fiirm a he iX and provided with curved edges which interlock and lie upon the surface of the pipe, the interlocked e ges having rivetfpins extending ythrough the same, thev seam thus formed lying wholly upon the exterior surface of the pipe, and the rivets lying against the exterior surface of the pipe without piercing the wall of the same. i

8. As a new article of manufacture, a pipe composed of a strip of metal coiled upon and away from itself, and having curved edges of unequal length in ap roximate relative alinement, the greater o which overlaps and interlocks with the smaller, and having rivetpins extending through the interlocked edges, the rivets in the interlocked edges lying wholly exterior of andupon the surface of the pipe.

In testimony whereof, I have hereunto set my hand at Los Angeles California this 15thl day of August 1906.

CHARLES S. HAMLIN.

In presence of- ANTON GLOETZNER, JULIA TowNsENn.

yso 

